I was offered the privilege to provide a first usage test and report for a new body powered device. This device allows an "on the fly" switch between VC (voluntary closing) and VO (voluntary opening) control mode.
If you use a prosthetic arm recreationally, for fun, for "the little things that count", such as opening the odd envelope, holding the odd water bottle while filling it with tap water, or pushing the odd knob on your coffee machine, then it probably does not matter what device you wear, or how it would hold up. But if you usually demand performances of your prosthesis that are in the domain of the "unreal", the difficult to cover for existing devices, then having a terminal device that allows on the fly switching between these two control modes really is a big thing. It means that I can switch between the most popular passive grasp mode (VO) - used to carry or hold on to items without thinking - and the most powerful dynamic and forceful grasp mode that ever exists for prosthetic arms (VC).
The device is called "Equilux" and it is (or will be) manufactured by Toughware PRX.
2514 West 104th Circle
Westminster, Colorado 80234-3508
An outstanding feature is that the device also provides for the fact that normally, VO works better with slightly longer control cables, whereas the VC system requires mildly shorter ones. This device's flip / switch design does away with this by way of clever design. So with one good control cable length, you are set.
As a further feature, it contains an interface for exchangeable grip pads. As we will see, this is a relevant aspect, that will have to be followed up in the future.
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